Is there a way to check how long ago these games were purchased? How much are you looking for the whole pack?
I am not sure about that, i think there is no way to check. But can be easy seen, as steam now tells on a message when a game is locked region, so you would see a message on the game in the inventory.
I have also rep on profile and on
http://bazaar.tf/thread/4667, so you can believe what i am saying.
You can add me to my steam account: Nomteck
And we can talk about a price.
Thanks.